/**
 * 	Copyright (c) 2012 Philipp Giese
 * 
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 * 
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
package com.orm.androrm.migration;

import android.content.Context;

import com.orm.androrm.DatabaseBuilder;
import com.orm.androrm.Filter;
import com.orm.androrm.Model;

public abstract class AndrormMigration<T extends Model> implements Migratable<T> {

	protected String mAction;	
	protected String mValue;
	
	public AndrormMigration(String value, String action) {
		mValue = value;
		mAction = action;
	}
	
	private Filter getFilter(Class<T> model) {
		Filter filter = new Filter();
		
		filter.is("mModel", DatabaseBuilder.getTableName(model))
			  .is("mAction", mAction)
			  .is("mValue", getValue(model));
		
		return filter;
	}
	
	protected boolean isApplied(Class<T> model, Context context) {
		Filter filter = getFilter(model);
		
		return !Migration.objects(context).filter(filter).isEmpty();
	}
	
	public String getAction() {
		return mAction;
	}
	
	public abstract String getValue(Class<T> model);
	
}
